Servos for large radars and launchers are either electro-hydraulic or all-electric.

大型雷达和发射装置的伺服系统，不是电动-液压式的，就是全电动式的。

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By designing custom hydraulic servos and managing the robot's gait so that it only uses high pressure when it truly needs to (like when it's beginning to take a step), the company hopes to bring that number to 20 percent.

ENGADGET: Raytheon's Sarcos XOS 2 military exoskeleton just does the heavy lifting -- for now